Technical description and composition of the SAMSUNG UE40D7000 TV, panel type and modules used. The composition of the modules.SAMSUNG LED
Model: UE40D7000
Chassis / Version: GENOA_P_UNIQUE
Panel: LTJ400HL05-J
LED backlight: 40-5030-LED-MCPCB-R / L
T-CON: S240LABMB3V0.6
LED driver (backlight): integrated into PSU
Power Supply (PSU): BN44-00427B
MainBoard: BN41-01622C
IC MainBoard: SDP1002, SDP94, SIL9489ACTUC, K4B2G1646C-HCH9, WT61P805
Tuner: BN40-00217B
UE40D7000 Specifications
SAMSUNG UE40D7000
General recommendations for TV LCD LED repair
Possible manifestations of defects
- SAMSUNG UE40D7000 does not turn on, the indicators on the front panel do not light up or flash. The TV does not respond to the control buttons and the remote control.
In some of these cases, the main switching power supply, the BN44-00427B module, is faulty. Then we recommend measuring its output voltages and, if they are absent, you should check the serviceability of the power switches and rectifier diodes of the converters for a possible short circuit.
In case of any breakdowns of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and, less often, the current sensor in the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and a short circuit between the terminals, are checked by replacing them with a known good one.
- No picture, sound, all other TV functions are working. When turned on, the image may sometimes appear for a second.
The malfunction in most of such cases is found in the nodes and elements of the LED panel backlight. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips, but sometimes the LED driver is also faulty.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
If SAMSUNG UE40D7000 has no picture, but there is sound, often the LTJ400HL05-J display backlight simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image when the external light hits the screen.
Replacing the LEDs requires disassembling the LTJ400HL05-J LCD panel, a process that requires experience and qualifications from the technician. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels
If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV you can see light through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard BN41-01622C often turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard BN41-01622C with an oscilloscope, as well as synchronization signals to the loops with drivers.
Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.
Repair or diagnostics of the BN41-01622C motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Repair of the board and replacement of microcircuits SDP1002, SDP94, SIL9489ACTUC, K4B2G1646C-HCH9, WT61P805 are performed with the necessary equipment and the corresponding element base. Failures associated with the use of BGA soldering technologies can be localized by warming up.
If there is no reception of television channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the BN40-00217B tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.
Attention to TV owners! Attempts to repair SAMSUNG UE40D7000 yourself are not recommended by the manufacturer and can lead to serious negative consequences!
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> SAMSUNG UE40D7000 Chassis GENOA_P_UNIQUE
DOWNLOAD SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Chassis : U55A for models UE40D7000L*, UE46D7000L*, UE55D7000L*
The appearance of the MainBoard BN41-01622C is shown in the figure below:BN41-01622C
BN41-01622C can be used in TVs:
SAMSUNG UE55D8000YS UE55D8000 (Panel LTJ550HQ11-L), SAMSUNG UE40D8000 UE40D8000YS (Panel LTJ400HL05-L).
The main features of the SAMSUNG UE40D7000 device:
Installed matrix (LED panel) LTJ400HL05-J.
Matrix control uses the Timing Controller (T-CON) S240LABMB3V0.6.
A converter combined with a power supply is used to power the backlight LEDs.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE40D7000 TV is carried out by the BN44-00427B power module, or its analogs.
MainBoard - the main board (motherboard) is a BN41-01622C module using SDP1002, SDP94, SIL9489ACTUC, K4B2G1646C-HCH9, WT61P805 and others.
Tuner BN40-00217B provides reception of television programs and tuning to channels.
There are files to download for the model UE40D7000LSXRU from the manufacturer:Latest firmware updates (latest firmwares):File type File name Version Date SizeEco Design Information LED7000Series_Environment_Information.pdf - 06.04.2012 1.26 MbUpdate file (USB) T-GAPDEUC_1033.2.exe 1033.2 24.06.2015 130.62 MbAllshare (All) AllShare_2.1.0.12031_10.exe 2.1.0.12031_10 02.04.2012 35.55 MbInstallation Guide AllShare_Guide-Eng.pdf 1.0 02.04.2012 3.67 MbUser Manuals and Instructions:File type File name Version Date SizeQuick Start Guide [UD7000-RU] BN68-03438J-02L04-0422.pdf 1.0 17.05.2011 19.39 MbDocument CE DoC GP_CE_DOC-Eng-0705.pdf 1.0 23.06.2011 0.27 MbUser manual 01_ENG_GPDVBEUA-0106.pdf 1.0 28.01.2012 16.8 MbUser manual 26_RUS_GPDVBEUA-0106.pdf 1.0 28.01.2012 16.77 MbFiles can be downloaded from the manufacturer's website for the UE40D7000LSXRU model.
SAMSUNG UE40D7000 TV with LCD display LTJ400HL05-J, 40 "(102 cm) diagonal 16: 9 format. The required screen brightness of 500 cd / m² is provided by LED backlighting. Edge LED.
There is support for 3D images with active (shutter) separation technology of the right and left channels.
The LTJ400HL05-J sensor and MainBoard BN41-01622C software allow viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD).
The UE40D7000 TV is equipped with SMART software, built-in applications and the ability to work on the Internet. The connection to the network can be carried out via Wi-Fi wireless connection. The input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of a digital signal is performed in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, WMA, MPEG4, Xvid, DivX, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART x2, RGB, VGA, HDMI x4, USB x3, Ethernet (RJ-45), Wi-Fi ... A headphone jack is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is provided. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080.
The digital tuner can receive television channels in the DVB-T MPEG4, DVB-C, DVB-S2 standards.
The power consumed when operating from the network is 130 W. Power supply BN44-00427B.
Dimensions: with stand 916x604x241 mm, without stand 916x532x30 mm.
TV weight: with stand: 11.5 kg, without stand: 10.1 kg.
Attention! Panel LTJ400HL05-J LED TV SAMSUNG UE40D7000 is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.